This Small Loop Antenna Is Suitable For All Radios, Sdrs, Radio Stations, And ReceiversThe Small Loop Antenna (Hfdloop) Is A Small-Sized Full-Band Ring Magnetic Field Active Receiving Antenna With A Receiving Frequency Range Of 50khz To 500mhz. It Mainly Consists Of A Top Jumper Board, A Small Loop Amplifier Board, A Small Loop Coil, A Feeder, A Feeder And Composed Of 12v Linear Power Supply,There Are Several Sets Of Switches On The Top Jumper Board And The Small Ring Amplifier Board. By Adjusting The Positions Of The Switches, Small Loop Antennas Of Different Structures Can Be Realized. Among Them, The Strip Can Achieve Twice The Voltage Gain Of Ordinary Small Rings;The Electric Field Shielding Ring Can Effectively Reduce Interference Caused By Electric Fields In The Surrounding Environment, Such As Electrostatic Discharge, Etc.;The Non-Shielded Ring Has A Simple Structure. The Whole Small Ring Can Be Replaced By A Thicker Wire. The Size Is Simple To Modify And Easy To Erect.1. Technical indicators of small loop antenna:2. Receiving frequency range: 50kHz to 500MHz3. Gain: 17dB@10MHz4. Output noise: -125dBm (@10MHz, =100Hz)5. P1dB: +15.5dBm@10MHz6. OIP3: +38dBm@10MHz7. Supply voltage: 9V to 12V8. Supply current: 130mA to 150mA9. Antenna interface: SMA(M)10. Output interface: SMA(F)11. Small ring coaxial cable model: RG40212. Small ring coaxial cable loss: 0.145dB/m13. Small loop antenna diameter: 60cm14.Colour:As Shown15.Material:ABSNote:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The UsePackage Contents:1 x Mini Loop Antenna Amplifier Board1 x Earphone Jack Adapter Cable1 x Top Jumper Board2 x Small Loop Coil RG402 Coaxial Cable)1 x 7m Feeder1 x 1m Feeder2 x Adhesive Hook1 x EVA Storage BagOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.